——Incorporating the topic of “Deep Depth Mine Geochemical Detection Technology†I. Research status, development trends and existing problems at home and abroad (1) Research status and development trend at home and abroad Increasing the depth of geochemical exploration and providing technical support for the breakthrough of the second deep prospecting space is a frontier field and urgent task for the exploration of geochemical development. Looking at the development trends at home and abroad, there are two main ways to improve the depth of geochemical exploration: one is the deep penetrating geochemical method based on surface operations proposed by the research team led by Academician Xie Xuejin, and the other is along with drilling and tunneling to the deep Deepen the development of underground geochemical exploration techniques. Underground geochemical exploration is a technical support urgently needed for mine prospecting in crisis mines, and is also a weak link in exploration geochemical research. The early 1980s, Ouyang Zong Qi, Wu Chenglie, Zou Guanghua so has established a non-ferrous metals, geochemical gold deposit exploration model, involving 21 provinces and 58 cases of typical deposits, with some guidance on mine concealed ore exploration effect. In the 1990s, Li Hui proposed the method of primary superimposed halo and structural superimposed halo, which achieved good prospecting results in more than 20 crisis gold mines in Jiaodong and Xiaoqinling. In recent years, tectonic geochemistry as a new detection technology in Gejiu tin polymetallic ore, lead zinc plant Huize Kirin mine, BLIND ORE forecast HETAOPING lead and zinc mine in the success (Hanrun Sheng, 2002 ). According to the tectonic geochemical anomaly, the approximate occurrence of concealed ore is inferred, and the rich lead-zinc ore body with a depth of 600-1200 m is found. Only the No. 8 ore body of Huize Lead-Zinc Mine has a new lead and zinc metal reserve of 806,000 tons, and the No. 10 ore body has a new lead-zinc metal reserve of 500,000 tons, which makes the Huize lead-zinc mine into the ranks of super-large deposits. The above examples fully demonstrate the effectiveness and important role of underground geochemical detection technology in the exploration of concealed ore deposits in deep mines. (2) Main technical issues 1. The halo formation mechanism and zoning law of the ore-forming primary halo of important types of deposits; 2. Geochemical sampling and sample processing techniques for underground (drilling, tunnel) exploration of important deposit types; 3. Comprehensive analysis and processing of three-dimensional spatial mineralization information and mapping technology; 4. Anomalous qualitative evaluation and demonstration of three-dimensional concealed ore body location prediction. Second, research content, key technologies and expected results and technical level (1) Main content and key technologies 1. Study various sample collection techniques, sample processing and extraction analysis techniques for deep concealed ore exploration, and improve the ability to discover various direct and indirect anomaly information of deep concealed ore. 2. Study the spatial relationship between important ore-controlling factors, indicator elements and various ore-forming halo geochemical parameters and ore bodies, establish trace elements of ore-forming elements, gradient changes of ore-forming elements, and gas-liquid inclusion groups during mineralization The sub-temperature-pressure and structural geochemical anomaly distribution models provide a basis for anomaly evaluation. 3. Explain the intrinsic relationship between ore-controlling tectonic evolution and migration and accumulation of ore-forming elements, study the laws of structural ore-control, apply the theory and method of mathematical geology, combine modern computer application technology, and combine the chemical elements to obtain mineral elements. A tectonic geochemical field that combines the distribution of native halos. 4. Inferring mineralization and enrichment centers based on tectonic geochemical anomalies, using different types of mineralization anomalies to analyze the mineralization types of concealed ore, inferring the flow direction of ore-forming fluids according to the zoning characteristics of different mineralization anomalies, and analyzing concealed ore bodies. The first dizziness and the tail halo, and the geochemical anomaly that marks the hydrothermal alteration to clarify the relationship between hydrothermal alteration and mineralization enrichment, infer the favorable metallogenic sites, in order to achieve the purpose of concealed ore positioning prediction. 5. Study the control effects of different grades, different orders and different scale structures on the deposits, summarize the spatial and temporal relationships between tectonic deformation, ore-forming fluids and ore bodies, and determine the structural period, based on comprehensive analysis. In the above, the ore-forming structure system of the ore field (bed) was determined, and the structural ore-controlling laws were further summarized, and the structural ore-control type and structural ore-controlling mode were proposed. 6. Tectonic geochemistry and tectonic stress field diagenesis and mineralization simulation experiment, using experimental tectonic geochemistry to carry out tectonic geochemical experimental simulation, restore the ore-forming tectonic stress field, and explore the tectonic deformation and element migration and rich integration of ore under the tectonic stress field Relationships, discussing the interrelationship between tectonic geochemistry and tectonic stress fields. 7. Inferring concealment based on the type of tectonic geochemical anomaly distribution, the characteristics of mineralization elements, the characteristics of anomalous zoning, and the migration law of ore-forming fluids, inferring the enrichment center of mineralization elements, the type of mineralization and the migration direction of ore-forming fluids. The general occurrence of the ore body, and the location prediction of the concealed ore. (II) Expected results and technical level Through breakthroughs and demonstration measurements of key technologies for the detection of primary halo in important deposit types (mines), the technical regulations for underground geochemical exploration of buried deep mines in mines are established, and major breakthroughs in mine prospecting are promoted, so that the geochemicals of concealed mines in deep mines The exploration technology has reached the international advanced level. 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